Stars are taking to social media to express their shock and condemnation of the white nationalist rally in Charlottesville, Virginia, on Saturday.

Charlottesville officials declared a state of emergency in the city shortly after 11 a.m., after hundreds of people crashed the rally, which saw men dressed in militia uniforms carrying shields and guns to protest the city's decision to remove a statue of Confederate General Robert E. Lee.

"I pray a true leader will rise to expel hatred from America. This is not US! This is Anti-American #ThisIsNotUS #Charlottesville #BeKind," Lady Gaga tweeted. "I know we are not created to hate each other, but to help & love. Use hashtag #BeKind #ThisIsNotUS to tweet positive messages. #Charlotte."